QTreeWidget/QTreeView样式

::branch分支项
::item精确控制内容项

QTreeView::item {
  border: 2px solid green;
  border-top-color: red;
  border-bottom-color: black;
  background-color: blue;
}
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QTreeView::item {
    border: 1px solid #d9d9d9;
    border-top-color: transparent;
    border-bottom-color: transparent;
}

QTreeView::item:hover {
  background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #e7effd, stop: 1 #cbdaf1);
  border: 1px solid #bfcde4;
}

QTreeView::item:selected {
  border: 1px solid #567dbc;
}

QTreeView::item:selected:active{
  background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #6ea1f1, stop: 1 #567dbc);
}

QTreeView::item:selected:!active {
  background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #6b9be8, stop: 1 #577fbf);
}
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QTreeView {
      show-decoration-selected: 1;
  }

QTreeView::item {
    border: 1px solid #d9d9d9;
    border-top-color: transparent;
    border-bottom-color: transparent;
}

QTreeView::item:hover {
  background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #e7effd, stop: 1 #cbdaf1);
  border: 1px solid #bfcde4;
}

QTreeView::item:selected {
  border: 1px solid #567dbc;
}

QTreeView::item:selected:active{
  background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #6ea1f1, stop: 1 #567dbc);
}

QTreeView::item:selected:!active {
  background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #6b9be8, stop: 1 #577fbf);
}

QTreeView::branch {
      background: black;
}

QTreeView::branch:has-siblings:!adjoins-item {
      background: green;
}

QTreeView::branch:has-siblings:adjoins-item {
      background: red;
}

QTreeView::branch:!has-children:!has-siblings:adjoins-item {
      background: blue;
}

QTreeView::branch:closed:has-children:has-siblings {
      background: yellow;
}

QTreeView::branch:has-children:!has-siblings:closed {
      background: gray;
}

QTreeView::branch:open:has-children:has-siblings {
      background: #87CEEB;
}

QTreeView::branch:open:has-children:!has-siblings {
      background: #008080;
}

/* 节点与兄弟节点之间的图标(在上的节点展开后) */
QTreeView::branch:has-siblings:!adjoins-item {
  border-image: url(vline.png) 0;
}

/*子项前面（非结束项)*/
QTreeView::branch:has-siblings:adjoins-item {
  border-image: url(branch-more.png) 0;
}

/*结束项*/
QTreeView::branch:!has-children:!has-siblings:adjoins-item {
  border-image: url(branch-end.png) 0;
}

/* 未打开节点时的图标 */
QTreeView::branch:has-children:!has-siblings:closed,
QTreeView::branch:closed:has-children:has-siblings {
      border-image: none;
      image: url(branch-closed.png);
}

/* 打开节点时的图标 */
QTreeView::branch:open:has-children:!has-siblings,
QTreeView::branch:open:has-children:has-siblings  {
      border-image: none;
      image: url(branch-open.png);
}
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QHeaderView

使用::section来控制样式，:该子控件拥有:middle，:fisrt，:last:only-one，:next-selected，:previous-selected，:selectted和checked状态。

QHeaderView::section {
     background-color: qlineargradient( x1:0, y1:0, x2:0, y2:1,
                                   stop:0 #616161, 
                                   stop: 0.5 #505050,
                                   stop: 0.6 #434343, stop:1 #656565);
     color: white;
     padding-left: 4px;
     border: 1px solid #6c6c6c;
}
QHeaderView::section:checked
{
    background-color: red;
}
/* 以下图标，只有在设置允许sortingEnable排序后，点击表头才会出现*/
QHeaderView::down-arrow {
     width:24px;
     height:24px;
     image: url(E:/arrow-down.jpg);
}
QHeaderView::up-arrow {
     width:24px;
     height:24px;
     image: url(E:/arrow-up.jpg);
}
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背景属性

alternate-background-color：交替背景色

用于修饰QAbstractItemView的子类
注意：先启用交替背景色属性

ui->tableWidget->setAlternatingRowColors(true);
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 QTableWidget{
 alternate-background-color: blue;
 background: yellow;
 }
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background：背景属性

支持 QAbstractItemView 子类, QAbstractSpinBox 子类, QCheckBox, QComboBox, QDialog, QFrame, QGroupBox, QLabel, QLineEdit, QMenu, QMenuBar, QPushButton, QRadioButton, QSplitter, QTextEdit, QToolTip, and plain QWidgets.

background-color：控件的背景色

background-image：用于控件的背景图像。如果图像有透明部分则显示透明部分。

background-repeat：设置是如何重复背景图像

QMainWindow {
background-image: url(://logo);
background-repeat: repeat-x;
}
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background-position:设置背景图像的位置

有top、bottom 、 left 、 right 、 center五个值

QLabel {
background-image: url(://logo);
background-repeat: no-repeat;
background-position: center;
}
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background-attachment:设置背景图像是否固定或者随着页面的其余部分滚动

scroll：默认值，背景图像会随着页面其余部分的滚动而滚动。
fixed：当页面的其余部分滚动时，背景图像不会移动。

background-clip：规定背景的绘制区域

有三个值border、padding、content

background-origin：相对于内容框来定位背景图像

有三个值border、padding、content